地球日-樹據訪問

23th April2025

地球日-樹據訪問

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 地球日-樹據訪問   樹木調查通常2人為1組,等高線是樹冠高度,顏色愈偏紅樹愈高,紅線與藍線分別為調查者與記錄者路徑,這2個人默契要非常好,在土地上交織訪問樹據,猜猜紅線是調查者還是記錄者 ?   為什麼要做樹木調查呢? 樹木調查是可以了解樹木情況,樹木生長是否良好,有沒有一些有問題的樹要先做處理,並驗證之前的處理是否有效。這些資料一比較會非常殘酷清楚知道那個單位廠商樹木照顧的好,可以幫管理者做準確的判斷。為後續的管理做出行動。

Lacandonia schismatica 霉草科

23th April2025

Lacandonia schismatica 霉草科

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Lacandonia schismatica 霉草科霉草科 霉草科腐生植物,沒有葉子與葉綠素,墨西哥南部恰帕斯州拉坎登叢林的特有物種,花完全打破了開花植物的一般模式(雌蕊在中央,雄蕊在外圍) 稀有的倒置花,中心為3個雄蕊,外圍60到80個雌蕊,缺乏明顯的花萼和花冠,花被膜有六個未分化的部分或透明的花被片。   資料來源: https://www.sobreestoyaquello.com/2017/01/lacandonia-schismatica-la-enigmatica.html https://www.naturepl.com/stock-photo-lacandonia-lacandonia-schismatica-parasitic-flower-with-inverted-sex-image01527016.html

《為世界級的樟樹神木作健康檢查》

03th March2025

《為世界級的樟樹神木作健康檢查》

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 《為世界級的樟樹神木作健康檢查》 信義鄉神木村的村名由來「樟樹神木(樟樹公神木)」,樹高近50公尺、胸高樹圍歷年丈量約在16.1至16.4公尺之間,為亞洲最大闊葉樹,更是地球上最巨大的樟樹。 由於樹齡高達700年,蟲蛀、菌腐及幹身中空難免,管理單位台大實驗林區管理處擬定五年檢測計畫,在今天2025.01.20邀請中央及地方林業單位、學術單位及多名權威樹醫師、病蟲害專家,為這棵世界級的神木作聯合健檢與會診。 參與會診的單位與專家包括前台大實驗林管處長王亞男、台大實驗林副處長鍾立展、森林病理專家蕭文偉博士、林業試驗所副所長吳孟玲、林業及自然保育署科長許賢斌、台大植物病理權威孫岩章教授及農業化學系主任許正一、嘉義大學植物醫學系教授郭章信、中興大學農業推廣中心副研究員顏志恒,以及縣政府農業處相關官員。 神木村村長忻軍與幾位鄉親到場支援,揮勝有幸受邀赴會學習。 這次健檢會診,由林試所提供專業人力與器材針對神木幹身作應力波檢測,了解其內部劣化腐朽的面積或材積比例,並就其根系範圍的土壤採樣化驗。 其結論是中空腐朽比例雖高達80至90%,但幸運的是它的外殼仍算完好,可以正常行光合作用,維管束、導管、篩管也都保有運作能力,整棵樹的健康狀況還算OK。 台大實驗林表示,為落實五年計畫,今後除了林區管理處對高岳營林區每個月都會到場作觀察與記錄之外,每年也都將執行一次完整的健檢與會診,並由與會專家針對神木面臨的病蟲害、菌腐、土壤及環境潛在威脅,提出具體有效的改善對策,讓這棵亞洲最大的闊葉樹,能夠健康活到千歲以上。   資料來源: 沈揮勝──和蕭文偉樹木醫學研究中心及其他 3 人

Torno brevemente sul grande Platano padovano protagonista di alcuni miei post dei giorni scorsi.

24th February2025

Torno brevemente sul grande Platano padovano protagonista di alcuni miei post dei giorni scorsi.

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   Torno brevemente sul grande Platano padovano protagonista di alcuni miei post dei giorni scorsi.    Image
 Torno brevemente sul grande Platano padovano protagonista di alcuni miei post dei giorni scorsi.   Il Platano, già vittima di una drastica capitozzatura, è ora inserito in un programma pluriennale di ricostruzione che prevede il ricorso a successive, ragionate potature. La scalarità del recupero intrapreso permette sia di contenere l'asportazione di massa fotosintetizzante entro i limiti di resilienza

Deletion and tandem duplications of biosynthetic genes drive the diversity of triterpenoids in Aralia elata

11th February2025

Deletion and tandem duplications of biosynthetic genes drive the diversity of triterpenoids in Aralia elata

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 Deletion and tandem duplications of biosynthetic genes drive the diversity of triterpenoids in Aralia elata  Tandem duplication of genes drives the diversity of oleanane-type pentacyclic triterpenes in A. elata The colinearity relationship of CYP72A (a), CSLM (b), and two UGT73 (c and d) tandem duplication regions between A. elata and P. notoginseng. The syntenic blocks are connected by

High-quality evergreen azalea genome reveals tandem duplication-facilitated low-altitude adaptability and floral scent evolution

11th February2025

High-quality evergreen azalea genome reveals tandem duplication-facilitated low-altitude adaptability and floral scent evolution

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 High-quality evergreen azalea genome reveals tandem duplication-facilitated low-altitude adaptability and floral scent evolutionCharacteristics of Rhododendron ovatum and its genome assembly. (a) Low-altitude and evergreen characteristics of R. ovatum. The genus Rhododendron contains five main subgenera, of which two subgenera (Rhododendron and Hymenanthes) commonly called ‘rhododendron’ are mainly distributed in alpine and subalpine zone, and the other three (Azaleastrum, Tsutsusi, and Pentanthera) commonly called ‘azalea’ are distributed in

Whole genome duplications in plants: an overview from Arabidopsis

11th February2025

Whole genome duplications in plants: an overview from Arabidopsis

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 Whole genome duplications in plants: an overview from ArabidopsisFig. 1.Chromosome status in the genus Arabidopsis after polyploidization events. A. arenosa and A. thaliana persist as both diploid and autotetraploid. Allopolyploid A. suecica is formed by a single hybridization event between A. thaliana and A. arenosa. Mechanisms leading to autotetraploids and allotetraploids are indicated. Other non-shown genus members also suffer polyploidization. Thus, A. lyrata autotetraploid are also frequent and A. kamchatica is originated from

解碼牛樟基因體闡明被子植物的演化 Stout camphor tree genome fills gaps in understanding of flowering plant genome evolution

09th February2025

解碼牛樟基因體闡明被子植物的演化 Stout camphor tree genome fills gaps in understanding of flowering plant genome evolution

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 解碼牛樟基因體闡明被子植物的演化 Stout camphor tree genome fills gaps in understanding of flowering plant genome evolutiona, Schematic representation of the intragenomic relationship among the 637 synteny blocks in the SCT genome. Synteny blocks (denoted by peach blocks) were assigned unambiguously into five linkage clusters representing ancient karyotypes and are colour coded. Purple blocks denote the synteny block assigned in the first